Axial orientation of molecular-beam-epitaxy-grown Fe3 SiGe hybrid structures and its degradation

Yoshihito Maeda, Takafumi Jonishi, Kazumasa Narumi, Yu Ichiro Ando, Koji Ueda, Mamoru Kumano, Taizoh Sadoh, Masanobu Miyao

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Abstract

The axial orientation of molecular-beam-epitaxy (MBE)-grown Fe3 Si (111) Ge (111) hybrid structures was investigated by Rutherford backscattering spectroscopy. We confirmed that during MBE above 300 °C, the interdiffusion of Fe and Ge atoms results in a composition change and the epitaxial growth of FeGe in Fe3 Si. Low-temperature (<200 °C) MBE can realize fully ordered D O3 - Fe3 Si with highly axial orientation [minimum yield (min) =2.2%]. Postannealing above 400 °C results in a composition change and the degradation of axial orientation in the off-stoichiometric Fe3 Si. The significance of stoichiometry with regard to thermal stability and the interfacial quality of Fe3 Si (111) Ge (111) hybrid structures was also discussed.

Original languageEnglish
Article number171910
JournalApplied Physics Letters
Volume91
Issue number17
DOIs
Publication statusPublished - Nov 1 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Maeda, Y., Jonishi, T., Narumi, K., Ando, Y. I., Ueda, K., Kumano, M., Sadoh, T., & Miyao, M. (2007). Axial orientation of molecular-beam-epitaxy-grown Fe3 SiGe hybrid structures and its degradation. Applied Physics Letters, 91(17), [171910]. https://doi.org/10.1063/1.2801705